Aflatoxin decomposition in various soils

Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
J S Angle

Abstract

The persistence of aflatoxin in the soil environment could potentially result in a number of adverse environmental consequences. To determine the persistence of aflatoxin in soil, 14C-labeled aflatoxin B1, was added to silt loam, sandy loam, and silty clay loam soils and the subsequent release of 14CO2 was determined. After 120 days of incubation, 8.1% of the original aflatoxin added to the silt loam soil was released as CO2. Aflatoxin decomposition in the sandy loam soil proceeded more quickly than the other two soils for the first 20 days of incubation. After this time, the decomposition rate declined and by the end of the study, 4.9% of the aflatoxin was released as CO2. Aflatoxin decomposition proceeded most slowly in the silty clay loam soil. Only 1.4% of aflatoxin added to the soil was released as CO2 after 120 days incubation. To determine whether aflatoxin was bound to the silty clay loam soil, aflatoxin B1 was added to this soil and incubated for 20 days. The soil was periodically extracted and the aflatoxin species present were determined using thin layer chromatographic (TLC) procedures. After one day of incubation, the degradation products, aflatoxins B2 and G2, were observed. It was also found that much of the afla...Continue Reading

Citations

Jan 1, 1989·Society for Applied Bacteriology Symposium Series·M O Moss
May 2, 2008·Canadian Journal of Microbiology·Cesare AccinelliJ R Wilkinson
Apr 24, 2017·Mycotoxin Research·James M StarrMustafa I Selim

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